Display screen or portion thereof with icon



The FIGURE is a front view of a display screen or portion thereof with icon showing my new design.

The broken lines around the Figure show a display screen or portion thereof and form no part of the claimed design. The broken lines within the Figure show unclaimed portions of the icon and form no part of the claimed design. 

CLAIM The ornamental design for a display screen or a portion thereof with icon, as shown and described. 